Recently, curtain wall decoration becomes more and more popular, resulting in rapid development in curtain wall engineering of China, the total amount of curtain wall ranks the first place in the world. With more varieties of stones materials, stones materials shapes change significantly and more and more complicated craftsmanship and strict construction and installation technology are required. In such circumstance, the common quality problems during construction increases accordingly.
1. Loose undercut panel anchor, too thin washer, big drill hole or the fall off of washer on the undercut panel anchor.
Measures: choosing proper drill according to the requirement of curtain wall’s system and design.
2. A part of undercut panel anchors are missing
Reason: explanation is not detailed, causing the connection element confronts with vertical keel. Besides, constructors has low consciousness for the security and quality of construction.
Measures: make key inspections on key parts during construction
3. Stone materials’ edges and angles are missed
Reason: there is no inspection or careless inspection when stones materials enter the construction site; during the transportation and storage, stone materials are bumped against; when stone materials are slotted and constructed, there is no cushion underneath and nothing is done to clean the stone materials; nuts inside the stone materials crack have not been taken out or stone materials’ edges and angles are damaged when nuts are taken out.
Measures: making strict inspection of stone materials entered the construction site; pay attention to the protection of finished products during transportation and storage; put cushion underneath stone materials during slotting and construction; adopt hard wood block as the cushion block and take it out on time after DEMAX curing.
4. Stone materials has such defects as chromatic aberration, hidden cracks, colour stripes and so on
Reason: no careful inspection made when materials enter the construction site, and no plate layout before installation
Measures: making strict inspection of stone materials entered the construction site, reject these plates exceeding the standard requirements; making plate layout before installation and reject these stone materials with serious chromatic aberration.
5. Too wide slot or too small distance between slot and the edge of plate
Reason: explanation is not detailed, constructors have low consciousness for quality
Measures: before installation, making technical pre-explanation of construction, controlling the slot width within the range of 6~7mm.
6. The effective length of slot is too short, anchoring depth is not enough
Measures: making technical pre-explanation of construction, ensuring the effective length of arc-shaped slot shorter than 80mm. In general, the length of pothook is 10~12mm.
7. The limestone on the mouth of slot has not been cleaned up
Measures: before impregnating the adhesive, the limestone on the mouth of slot should be cleaned up.
8. Adhesive impregnated into the mouth of notch is not enough
Measures: DEMAX should be impregnated fully and QC should make strict inspection into it.
9. The installation finished surface of the stone materials is uneven, perpendicularity can not meet the requirement
Reason: steel wire and fishing thread are not used in stone materials construction
Measures: before installing the stone materials on the wall, vertical steel wire and transverse fishing thread should be set according to blueprint to control the flatness of plates and the width of slob joint.
11. The width of slob joint is different, which can not meet the design requirements
Reason: improper operation; the adhesive is not suitable to be used for stone materials
Measures: enhance constructors’ protection consciousness toward finished products; construction on plates should be done before large scale construction and after making sure there is no contamination, construction can be done.
12. Using common welding rod to connect stainless steel connection elements and sub keel
Reason: construction teams make cheating on workmanship and materials
Measures: making key inspection on key section
12. Using common welding rod to connect stainless steel connection elements and sub keel
Reason: construction teams make cheating on workmanship and materials
Measures: making key inspection on key section
In the construction of stone curtain wall, the quality of raw material decides the engineering quality. Nanjing Mankate Science & Technology Co., Ltd., established in 2004, is a high-tech enterprise that specializes in researching, developing, manufacturing and selling a full range of anchoring and fixing systems, products and accessories for building reinforcement in construction industry. We pay high attention to the technical research and development and the products quality. When production is completed, quality testing will be make upon all our products. We never allow one piece of unqualified products to be marketed. For high quality and service, we are always on the way!
Editor: NJMKT
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